Hurricane season is over, but you still need to know about rapid intensification and why it matters in tropical cyclones and winter storms like the one occurring over the eastern United States.

The National Weather Service is calling the system moving across the Northeast on Tuesday, Dec. 2 the first winter storm of the year for New England.

Cold, wet and icy conditions are occurring from the Appalachians to Maine, and are expected to make the evening commute messy and dangerous, said the Weather Prediction Center. And, up to 12 inches of snow could fall across parts of New England.

All the buzz about the storm has triggered talk of a bomb cyclone.

But not just any storm can be a bomb cyclone. They are born when weather systems collide in a way that forces the barometric pressure to plunge suddenly over 24 hours, causing more intense winds and precipitation such as freezing rain, ice and snow.